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Fuhui Wang - One of the best experts on this subject based on the ideXlab platform.

  • studies on Electrochemical Noise analysis of an epoxy coating metal system under marine alternating hydrostatic pressure by pattern recognition method
    Progress in Organic Coatings, 2017
    Co-Authors: Fandi Meng, Fuhui Wang, Li Liu
    Abstract:

    Abstract The Electrochemical Noise (EN) measurement of an epoxy coating/metal system under alternating hydrostatic pressure (AHP) was performed, and pattern recognition (PR) method was utilized for EN data analysis to evaluate the protective performance of the coating system. The results indicated that EN time records displayed different characteristics for corrosion states of the coated steel under AHP, some certain potential spikes should be due to a residual effect of the pressure change instead of a corrosion effect. The PR procedures, including principal component analysis (PCA), hierarchical agglomerative cluster analysis (HACA) and discriminant analysis (DA), were applied to the establishment of an evaluation model for EN statistical parameters. Based on the established discriminant functions, different failure stages of the other coatings under AHP can be identified conveniently and accurately.

  • Electrochemical Noise analysis on the crevice corrosion behavior of ni cr mo v high strength steel using recurrence plots
    Journal of Applied Electrochemistry, 2011
    Co-Authors: Fuhui Wang, Tao Zhang, Yawei Shao, Guozhe Meng, Yuan Cong
    Abstract:

    This article makes a study of Electrochemical Noise analysis on the crevice corrosion behavior of Ni–Cr–Mo–V high strength steel using recurrence plots. The crevice corrosion behavior of Ni–Cr–Mo–V high strength steel was investigated by the Electrochemical Noise (EN) technique and SEM observation. The experimental results reveal that the crevice corrosion could be distinguished by three stages including induction stage, transformation stage, and stable stage. While increasing the growth probability of metastable corrosion, the presence of crevice decreases the initiation rate of metastable corrosion. In the case of crevice, the metastable corrosion is easy to develop into stable one.

  • effect of hydrostatic pressure on the corrosion behaviour of ni cr mo v high strength steel
    Corrosion Science, 2010
    Co-Authors: Yange Yang, Fuhui Wang, Tao Zhang, Yawei Shao, Guozhe Meng
    Abstract:

    Effect of hydrostatic pressure on the corrosion behaviour of Ni-Cr-Mo-V high strength steel was investigated by Electrochemical measurements and SEM observation. The Electrochemical Noise (EN) data was analyzed based on non-linear dynamic theory. The experimental results revealed that hydrostatic pressure decreased the corrosion resistance of Ni-Cr-Mo-V steel and the corrosion at high hydrostatic pressure was more uniform due to the higher initiation rate and lower growth probability of metastable pitting. (C) 2010 Elsevier Ltd. All rights reserved.

  • in situ study of the formation process of stannate conversion coatings on az91d magnesium alloy using Electrochemical Noise
    Corrosion Science, 2010
    Co-Authors: Fuhui Wang, Tao Zhang, Yawei Shao, Guozhe Meng
    Abstract:

    The formation process of stannate conversion coating (CC) on AZ91D alloy was in-situ investigated by Electrochemical Noise (EN). The wavelet transform, as well as Noise resistance (R(n)) and spectral Noise resistance (R(sn)), had been employed to analyze the EN data. It was revealed that there exist two distinguishing stages of stannate CC formation process on AZ91D alloy, including an incubation stage companying with the nucleation and nuclei dissolution process, a periodical growth stage involving hemispherical particles growth and coating dissolution process. Furthermore, the results demonstrated that EN was a powerful tool to investigate rapid Electrochemical process, such as CC formation process. (C) 2009 Elsevier Ltd. All rights reserved.

  • high pitting corrosion resistance of pure aluminum with nanoscale twins
    Journal of The Electrochemical Society, 2009
    Co-Authors: Fuhui Wang, Tao Zhang, Yawei Shao, Guozhe Meng, Liyan Wei, Chaofang Dong
    Abstract:

    Pure aluminum coating with a nanoscale twin structure (NT Al) was successfully deposited by using a magnetron-sputter technique. The corrosion behavior of the NT Al was investigated and compared with that of cast Al in an aqueous acidic chloride solution by using potentiodynamic polarization and an Electrochemical Noise technique. The results indicated that for NT Al, both the cathodic and anodic reaction processes were greatly inhibited, the corrosion potential shifted to a more positive value, and the corrosion current density apparently decreased. The NT structure affected the pitting behavior of pure aluminum in two ways based on the stochastic analysis of the Electrochemical Noise data: (i) the formation rate of metastable pits was accelerated and (ii) the growth of the stable pit was impeded. This leads to the enhancement of the pitting resistance for NT Al coatings.

Tao Zhang - One of the best experts on this subject based on the ideXlab platform.

  • comparison of different Electrochemical techniques for continuous monitoring of the microbiologically influenced corrosion of 2205 duplex stainless steel by marine pseudomonas aeruginosa biofilm
    Corrosion Science, 2017
    Co-Authors: Yang Zhao, Tao Zhang, Enzhe Zhou, Yuzhi Liu, Shangju Liao
    Abstract:

    Abstract Different Electrochemical techniques and surface analysis methods were used to continuously monitor the corrosion of 2205 duplex stainless steel (DSS) in P. aeruginosa inoculated medium. It was found that linear polarization resistance and Electrochemical impedance spectroscopy, significantly inhibited the attachment and growth of the biofilm, due to an internal electric field, leading to lower corrosion rates. In comparison, Electrochemical Noise as a passive Electrochemical measurement technique did not adversely impact the biofilm, and the corrosion rate and the largest pit depth distribution from Electrochemical Noise were the closest to those from weight-loss data, making it a more suitable technique to monitor MIC by fragile biofilms.

  • Electrochemical Noise analysis on the crevice corrosion behavior of ni cr mo v high strength steel using recurrence plots
    Journal of Applied Electrochemistry, 2011
    Co-Authors: Fuhui Wang, Tao Zhang, Yawei Shao, Guozhe Meng, Yuan Cong
    Abstract:

    This article makes a study of Electrochemical Noise analysis on the crevice corrosion behavior of Ni–Cr–Mo–V high strength steel using recurrence plots. The crevice corrosion behavior of Ni–Cr–Mo–V high strength steel was investigated by the Electrochemical Noise (EN) technique and SEM observation. The experimental results reveal that the crevice corrosion could be distinguished by three stages including induction stage, transformation stage, and stable stage. While increasing the growth probability of metastable corrosion, the presence of crevice decreases the initiation rate of metastable corrosion. In the case of crevice, the metastable corrosion is easy to develop into stable one.

  • effect of hydrostatic pressure on the corrosion behaviour of ni cr mo v high strength steel
    Corrosion Science, 2010
    Co-Authors: Yange Yang, Fuhui Wang, Tao Zhang, Yawei Shao, Guozhe Meng
    Abstract:

    Effect of hydrostatic pressure on the corrosion behaviour of Ni-Cr-Mo-V high strength steel was investigated by Electrochemical measurements and SEM observation. The Electrochemical Noise (EN) data was analyzed based on non-linear dynamic theory. The experimental results revealed that hydrostatic pressure decreased the corrosion resistance of Ni-Cr-Mo-V steel and the corrosion at high hydrostatic pressure was more uniform due to the higher initiation rate and lower growth probability of metastable pitting. (C) 2010 Elsevier Ltd. All rights reserved.

  • in situ study of the formation process of stannate conversion coatings on az91d magnesium alloy using Electrochemical Noise
    Corrosion Science, 2010
    Co-Authors: Fuhui Wang, Tao Zhang, Yawei Shao, Guozhe Meng
    Abstract:

    The formation process of stannate conversion coating (CC) on AZ91D alloy was in-situ investigated by Electrochemical Noise (EN). The wavelet transform, as well as Noise resistance (R(n)) and spectral Noise resistance (R(sn)), had been employed to analyze the EN data. It was revealed that there exist two distinguishing stages of stannate CC formation process on AZ91D alloy, including an incubation stage companying with the nucleation and nuclei dissolution process, a periodical growth stage involving hemispherical particles growth and coating dissolution process. Furthermore, the results demonstrated that EN was a powerful tool to investigate rapid Electrochemical process, such as CC formation process. (C) 2009 Elsevier Ltd. All rights reserved.

  • high pitting corrosion resistance of pure aluminum with nanoscale twins
    Journal of The Electrochemical Society, 2009
    Co-Authors: Fuhui Wang, Tao Zhang, Yawei Shao, Guozhe Meng, Liyan Wei, Chaofang Dong
    Abstract:

    Pure aluminum coating with a nanoscale twin structure (NT Al) was successfully deposited by using a magnetron-sputter technique. The corrosion behavior of the NT Al was investigated and compared with that of cast Al in an aqueous acidic chloride solution by using potentiodynamic polarization and an Electrochemical Noise technique. The results indicated that for NT Al, both the cathodic and anodic reaction processes were greatly inhibited, the corrosion potential shifted to a more positive value, and the corrosion current density apparently decreased. The NT structure affected the pitting behavior of pure aluminum in two ways based on the stochastic analysis of the Electrochemical Noise data: (i) the formation rate of metastable pits was accelerated and (ii) the growth of the stable pit was impeded. This leads to the enhancement of the pitting resistance for NT Al coatings.

Guozhe Meng - One of the best experts on this subject based on the ideXlab platform.

  • Electrochemical Noise analysis on the crevice corrosion behavior of ni cr mo v high strength steel using recurrence plots
    Journal of Applied Electrochemistry, 2011
    Co-Authors: Fuhui Wang, Tao Zhang, Yawei Shao, Guozhe Meng, Yuan Cong
    Abstract:

    This article makes a study of Electrochemical Noise analysis on the crevice corrosion behavior of Ni–Cr–Mo–V high strength steel using recurrence plots. The crevice corrosion behavior of Ni–Cr–Mo–V high strength steel was investigated by the Electrochemical Noise (EN) technique and SEM observation. The experimental results reveal that the crevice corrosion could be distinguished by three stages including induction stage, transformation stage, and stable stage. While increasing the growth probability of metastable corrosion, the presence of crevice decreases the initiation rate of metastable corrosion. In the case of crevice, the metastable corrosion is easy to develop into stable one.

  • effect of hydrostatic pressure on the corrosion behaviour of ni cr mo v high strength steel
    Corrosion Science, 2010
    Co-Authors: Yange Yang, Fuhui Wang, Tao Zhang, Yawei Shao, Guozhe Meng
    Abstract:

    Effect of hydrostatic pressure on the corrosion behaviour of Ni-Cr-Mo-V high strength steel was investigated by Electrochemical measurements and SEM observation. The Electrochemical Noise (EN) data was analyzed based on non-linear dynamic theory. The experimental results revealed that hydrostatic pressure decreased the corrosion resistance of Ni-Cr-Mo-V steel and the corrosion at high hydrostatic pressure was more uniform due to the higher initiation rate and lower growth probability of metastable pitting. (C) 2010 Elsevier Ltd. All rights reserved.

  • in situ study of the formation process of stannate conversion coatings on az91d magnesium alloy using Electrochemical Noise
    Corrosion Science, 2010
    Co-Authors: Fuhui Wang, Tao Zhang, Yawei Shao, Guozhe Meng
    Abstract:

    The formation process of stannate conversion coating (CC) on AZ91D alloy was in-situ investigated by Electrochemical Noise (EN). The wavelet transform, as well as Noise resistance (R(n)) and spectral Noise resistance (R(sn)), had been employed to analyze the EN data. It was revealed that there exist two distinguishing stages of stannate CC formation process on AZ91D alloy, including an incubation stage companying with the nucleation and nuclei dissolution process, a periodical growth stage involving hemispherical particles growth and coating dissolution process. Furthermore, the results demonstrated that EN was a powerful tool to investigate rapid Electrochemical process, such as CC formation process. (C) 2009 Elsevier Ltd. All rights reserved.

  • high pitting corrosion resistance of pure aluminum with nanoscale twins
    Journal of The Electrochemical Society, 2009
    Co-Authors: Fuhui Wang, Tao Zhang, Yawei Shao, Guozhe Meng, Liyan Wei, Chaofang Dong
    Abstract:

    Pure aluminum coating with a nanoscale twin structure (NT Al) was successfully deposited by using a magnetron-sputter technique. The corrosion behavior of the NT Al was investigated and compared with that of cast Al in an aqueous acidic chloride solution by using potentiodynamic polarization and an Electrochemical Noise technique. The results indicated that for NT Al, both the cathodic and anodic reaction processes were greatly inhibited, the corrosion potential shifted to a more positive value, and the corrosion current density apparently decreased. The NT structure affected the pitting behavior of pure aluminum in two ways based on the stochastic analysis of the Electrochemical Noise data: (i) the formation rate of metastable pits was accelerated and (ii) the growth of the stable pit was impeded. This leads to the enhancement of the pitting resistance for NT Al coatings.

  • Electrochemical Noise analysis on the pit corrosion susceptibility of mg 10gd 2y 0 5zr az91d alloy and pure magnesium using stochastic model
    Corrosion Science, 2008
    Co-Authors: Xiaolan Liu, Yawei Shao, Guozhe Meng
    Abstract:

    Pit corrosion susceptibilities of Mg-10Gd-2Y-0.5Zr alloy, AZ91D alloy and pure magnesium were investigated by means of Electrochemical Noise (EN). The EN data have been analyzed based upon the combined stochastic theory and shot-Noise theory. Pit initiation process has been modeled as a nonhomogeneous Poisson process and analyzed using a Weibull distribution function. Pit growth process has been simulated by a nonhomogeneous Markov process and analyzed using Gumbel distribution function. The EN results implied that Mg-10Gd-2Y-0.5Zr alloy had the highest pit initiation rate and pit growth probability, which revealed that Mg-10Gd-2Y-0.5zr alloy had the highest pit susceptibility. (C) 2008 Elsevier Ltd. All rights reserved.

Yawei Shao - One of the best experts on this subject based on the ideXlab platform.

  • Electrochemical Noise analysis on the crevice corrosion behavior of ni cr mo v high strength steel using recurrence plots
    Journal of Applied Electrochemistry, 2011
    Co-Authors: Fuhui Wang, Tao Zhang, Yawei Shao, Guozhe Meng, Yuan Cong
    Abstract:

    This article makes a study of Electrochemical Noise analysis on the crevice corrosion behavior of Ni–Cr–Mo–V high strength steel using recurrence plots. The crevice corrosion behavior of Ni–Cr–Mo–V high strength steel was investigated by the Electrochemical Noise (EN) technique and SEM observation. The experimental results reveal that the crevice corrosion could be distinguished by three stages including induction stage, transformation stage, and stable stage. While increasing the growth probability of metastable corrosion, the presence of crevice decreases the initiation rate of metastable corrosion. In the case of crevice, the metastable corrosion is easy to develop into stable one.

  • effect of hydrostatic pressure on the corrosion behaviour of ni cr mo v high strength steel
    Corrosion Science, 2010
    Co-Authors: Yange Yang, Fuhui Wang, Tao Zhang, Yawei Shao, Guozhe Meng
    Abstract:

    Effect of hydrostatic pressure on the corrosion behaviour of Ni-Cr-Mo-V high strength steel was investigated by Electrochemical measurements and SEM observation. The Electrochemical Noise (EN) data was analyzed based on non-linear dynamic theory. The experimental results revealed that hydrostatic pressure decreased the corrosion resistance of Ni-Cr-Mo-V steel and the corrosion at high hydrostatic pressure was more uniform due to the higher initiation rate and lower growth probability of metastable pitting. (C) 2010 Elsevier Ltd. All rights reserved.

  • in situ study of the formation process of stannate conversion coatings on az91d magnesium alloy using Electrochemical Noise
    Corrosion Science, 2010
    Co-Authors: Fuhui Wang, Tao Zhang, Yawei Shao, Guozhe Meng
    Abstract:

    The formation process of stannate conversion coating (CC) on AZ91D alloy was in-situ investigated by Electrochemical Noise (EN). The wavelet transform, as well as Noise resistance (R(n)) and spectral Noise resistance (R(sn)), had been employed to analyze the EN data. It was revealed that there exist two distinguishing stages of stannate CC formation process on AZ91D alloy, including an incubation stage companying with the nucleation and nuclei dissolution process, a periodical growth stage involving hemispherical particles growth and coating dissolution process. Furthermore, the results demonstrated that EN was a powerful tool to investigate rapid Electrochemical process, such as CC formation process. (C) 2009 Elsevier Ltd. All rights reserved.

  • high pitting corrosion resistance of pure aluminum with nanoscale twins
    Journal of The Electrochemical Society, 2009
    Co-Authors: Fuhui Wang, Tao Zhang, Yawei Shao, Guozhe Meng, Liyan Wei, Chaofang Dong
    Abstract:

    Pure aluminum coating with a nanoscale twin structure (NT Al) was successfully deposited by using a magnetron-sputter technique. The corrosion behavior of the NT Al was investigated and compared with that of cast Al in an aqueous acidic chloride solution by using potentiodynamic polarization and an Electrochemical Noise technique. The results indicated that for NT Al, both the cathodic and anodic reaction processes were greatly inhibited, the corrosion potential shifted to a more positive value, and the corrosion current density apparently decreased. The NT structure affected the pitting behavior of pure aluminum in two ways based on the stochastic analysis of the Electrochemical Noise data: (i) the formation rate of metastable pits was accelerated and (ii) the growth of the stable pit was impeded. This leads to the enhancement of the pitting resistance for NT Al coatings.

  • Electrochemical Noise analysis on the pit corrosion susceptibility of mg 10gd 2y 0 5zr az91d alloy and pure magnesium using stochastic model
    Corrosion Science, 2008
    Co-Authors: Xiaolan Liu, Yawei Shao, Guozhe Meng
    Abstract:

    Pit corrosion susceptibilities of Mg-10Gd-2Y-0.5Zr alloy, AZ91D alloy and pure magnesium were investigated by means of Electrochemical Noise (EN). The EN data have been analyzed based upon the combined stochastic theory and shot-Noise theory. Pit initiation process has been modeled as a nonhomogeneous Poisson process and analyzed using a Weibull distribution function. Pit growth process has been simulated by a nonhomogeneous Markov process and analyzed using Gumbel distribution function. The EN results implied that Mg-10Gd-2Y-0.5Zr alloy had the highest pit initiation rate and pit growth probability, which revealed that Mg-10Gd-2Y-0.5zr alloy had the highest pit susceptibility. (C) 2008 Elsevier Ltd. All rights reserved.

A Heyn - One of the best experts on this subject based on the ideXlab platform.

  • environmental factors affecting pitting corrosion of type 304 stainless steel investigated by Electrochemical Noise measurements under potentiostatic control
    Corrosion Science, 2013
    Co-Authors: Helmuth Sarmiento Klapper, J Goellner, Andreas Burkert, A Heyn
    Abstract:

    Abstract Electrochemical Noise measurements on anodically polarised type 304 stainless steel surfaces in contact with buffer solutions of neutral pH were performed to study the effect of chloride ions in the nucleation of pitting corrosion. Passive layer stability and susceptibility to pitting corrosion after pickling and passivation at different environmental conditions were also investigated by means of Electrochemical current Noise measurements under cathodic and anodic polarisation. According to the obtained experimental results pits nucleate independently on the presence of chloride ions. It has been also shown that protectiveness of stainless steel surfaces after pickling strongly depends on the relative humidity of the environment in which the surface is subsequently passivated.

  • the influence of the cathodic process on the interpretation of Electrochemical Noise signals arising from pitting corrosion of stainless steels
    Corrosion Science, 2010
    Co-Authors: Helmuth Sarmiento Klapper, J Goellner, A Heyn
    Abstract:

    The use of Electrochemical Noise (EN) measurements for the investigation and monitoring of corrosion has allowed many interesting advances in the corrosion science in recent years. A special advantage of EN measurements includes the possibility to detect and study the early stages of localized corrosion. Nevertheless, the understanding of the Electrochemical information included in the EN signal is actually very limited. The role of the cathodic process on the EN signals remains uncertain and has not been sufficiently investigated to date. Thus, an accurate understanding of the influence of the cathodic process on the EN signal is still lacking. On the basis of different kinetics of the oxygen reduction it was established that the anodic amplitude of transients arising from pitting corrosion on stainless steel can be decreased by the corresponding electron consumption of the cathodic process. Therefore, the stronger the electron consumption, the weaker the anodic amplitude of the EN signal becomes. EN signals arising from pitting corrosion on stainless steel can be measured because the cathodic process is inhibited by the passive layer. This was confirmed by means of EN measurements under cathodic polarisation. Since the cathodic process plays a decisive role on the form of transients arising from pitting corrosion, its influence must be considered in the evaluation and interpretation of the EN signals.